Linear motor and vehicle

Abstract

The application discloses a linear motor and a vehicle, and the linear motor comprises a first component, a second component and a detection component, the first component comprises a first body and a first magnetic part, the second component is movably connected with the first component in the axial direction, the second component comprises a second body and a second magnetic part, the detection component is used for detecting the displacement of the second component relative to the first component, and comprises a first detection part and a second detection part, the first detection part is arranged on the first component, the second detection part is arranged on the second component, and at least part of at least one of the first detection part and the second detection part is located on the two sides of the second body respectively relative to the second magnetic part. According to the linear motor, the layout is reasonable, and the compactness and applicability of the structure are improved.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction technology, and in particular to a linear motor and a vehicle. Background Technology

[0002] In related technologies, shock absorbers are typically installed in vehicles to reduce vehicle vibrations. Some shock absorbers utilize the principle of linear motors to adjust the thrust or damping of the shock absorber. A detection component is usually included to detect changes in the length of the linear motor. However, the layout of the linear motor often affects the placement of the detection component, making it susceptible to the heat generated by the linear motor during operation. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a linear motor with a more reasonable layout, which is beneficial to improving structural compactness and applicability.

[0004] The present invention also proposes a vibration damping assembly having the above-mentioned linear motor.

[0005] The present invention also proposes a vehicle having the above-described vibration damping assembly.

[0006] A linear motor according to a first aspect of the present invention includes: a first component, the first component including a first body and a first magnetic element disposed on the first body; a second component, the second component being axially movably coupled to the first component, the second component including a second body and a second magnetic element disposed on the second body; and a detection component for detecting displacement of the second component relative to the first component, the detection component including a first detection element and a second detection element, the first detection element being disposed on the first component, the second detection element being disposed on the second component, at least a portion of at least one of the first detection element and the second detection element being located on opposite sides of the second body respectively with respect to the second magnetic element; one of the first magnetic element and the second magnetic element being a coil, and the other being a permanent magnet or an electromagnet.

[0007] According to an embodiment of the present invention, a linear motor is provided with a detection component including a first detection element and a second detection element to detect the position of the second component relative to the first component. At least a portion of at least one of the first detection element and the second detection element and the second magnetic element are respectively disposed on both sides of the second body. This facilitates that at least one of the first detection element and the second detection element avoids areas on the second component that are prone to high temperatures, thereby reducing the impact of the high temperature of the second component on the detection component. This is beneficial to improving the reliability of the detection component and the reliability of the linear motor.

[0008] In some embodiments, the second body is constructed as a housing, the housing having a cavity, the second magnetic element and the first magnetic element being located within the cavity, and the second detection element being located outside the cavity.

[0009] In some embodiments, the first body has a first guide portion, the second body has a second guide portion, the first guide portion is a first guide rod, the second guide portion is a first guide hole, the first detection element is disposed on the first guide rod, and at least a portion of the first detection element is adapted to extend out of the second body through the first guide hole.

[0010] In some embodiments, the outer peripheral wall of the first guide rod is formed with a first mounting groove, and at least a portion of the first detection element is accommodated in the first mounting groove.

[0011] In some embodiments, a second mounting groove is provided on the outer wall of the housing near the first guide hole, and the second mounting groove is used to mount the second detection element.

[0012] In some embodiments, at least a portion of the thickness of the housing gradually decreases in the direction from the end of the housing to the first guide hole, and the second detection element and the second magnetic element are located on the inner and outer sides of the housing, respectively.

[0013] In some embodiments, the linear motor further includes: a first guide bearing, wherein one of the first guide rods and the housing is connected to the first guide bearing, and the other of the first guide rods and the housing is in sliding engagement with the first guide bearing.

[0014] In some embodiments, the first guide bearing and the second detection element are both located outside the second body, the first guide bearing is disposed on the side of the second detection element opposite to the second body, and covers at least a portion of the second detection element.

[0015] In some embodiments, the second detection element is disposed at the first guide hole.

[0016] In some embodiments, the housing at the first guide hole is provided with a first notch, which is used to provide the second detection element.

[0017] In some embodiments, the linear motor further includes: a first guide bearing, one of the first guide rods and the housing being connected to the first guide bearing, and the other of the first guide rods and the housing being slidably engaged with the first guide bearing; the first guide bearing having a second notch, the second notch being disposed opposite to the first detection element.

[0018] In some embodiments, the linear motor further includes: a first guide bearing, one of the first guide rods and the housing being connected to the first guide bearing, and the other of the first guide rods and the housing being slidably engaged with the first guide bearing; the first guide bearing having a second notch, and the second detection element being disposed at the second notch.

[0019] In some embodiments, the first guide rod has a first positioning portion, the first guide bearing has a second positioning portion, and the second positioning portion is circumferentially positioned with the first positioning portion.

[0020] In some embodiments, a wiring groove is formed on the outer peripheral wall of the first guide rod, and the connecting wire of the first magnetic component is guided to the second body through the wiring groove.

[0021] In some embodiments, the first body has a third guide portion, the second body has a fourth guide portion, the third guide portion is a second guide hole, the fourth guide portion is a second guide rod, the first body has a clearance space, the clearance space is connected to the second guide hole, and the second guide rod passes through the second guide hole and is adapted to be accommodated in the clearance space.

[0022] In some embodiments, the first body includes a second guide bearing that defines a second guide hole and is located at one end of the clearance space away from the first guide portion.

[0023] In some embodiments, the detection component is an electromagnetic induction component.

[0024] In some embodiments, the linear motor further includes: a first buffer and a second buffer, both the first buffer and the second buffer being fixed to the first body, the first buffer being disposed within the second body, and the second buffer being disposed outside the second body.

[0025] In some embodiments, the linear motor further includes: a protective member, the protective member being disposed around the second buffer member, the length of the protective member being adjustable in the moving direction of the second component, and both ends of the protective member being sealed to the first component and the second component respectively.

[0026] In some embodiments, the linear motor further includes: a first mounting base fixed to the first component; a second mounting base fixed to the second component; and a damping spring sleeved outside the second buffer and abutting between the first mounting base and the second mounting base.

[0027] A vehicle according to a second aspect of the present invention includes a body, wheels, and a linear motor according to the first aspect of the present invention described above, wherein one of the first component and the second component is adapted to be connected to the wheels, and the other is adapted to be connected to the body.

[0028] According to the vehicle of the present invention, by employing the above-described linear motor, the linear motor arrangement is flexible to a certain extent, which can improve vehicle stability.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0031] Figure 1 This is a schematic diagram of a linear motor according to an embodiment of the present invention;

[0032] Figure 2 yes Figure 1 A cross-sectional view of the linear motor shown;

[0033] Figure 3 It is along Figure 2 Sectional view of line AA in the middle;

[0034] Figure 4 yes Figure 2 A partial schematic diagram of the linear motor shown;

[0035] Figure 5 yes Figure 1 The bottom view of the linear motor shown;

[0036] Figure 6 This is a partial schematic diagram of a linear motor according to another embodiment of the present invention;

[0037] Figure 7 yes Figure 6 A cross-sectional view of the linear motor shown;

[0038] Figure 8 yes Figure 6 A schematic diagram of the first guide bearing shown.

[0039] Figure label:

[0040] Linear motor 100, center axis L,

[0041] Component 1

[0042] First body 11, first guide part 11a, third guide part 11b, first positioning part 11c, wiring groove 11d, clearance space 11e, first mounting groove 11f, first guide rod 11g, second guide hole 11h, flange 11i, first notch 11j, second guide bearing 111, retaining ring 112, first magnetic component 12.

[0043] Second component 2, second body 21, cavity 210, cylinder 211, first cover plate 212, second cover plate 213, push rod 214, second guide part 21a, fourth guide part 21b, second mounting groove 21c, first guide hole 21d, second guide rod 21e, second magnetic component 22.

[0044] Detection component 3, first detection component 31, second detection component 32, first guide bearing 4, second positioning part 4a, second notch 40, first buffer component 61, second buffer component 62, protective component 7, first mounting base 81, second mounting base 82, vibration damping spring 83. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0046] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0047] Hereinafter, with reference to the accompanying drawings, a linear motor 100 according to an embodiment of the present invention will be described.

[0048] like Figure 1 and Figure 2As shown, the linear motor 100 includes a first component 1 and a second component 2. The first component 1 includes a first body 11 and a first magnetic element 12 disposed on the first body 11. The second component 2 is movably coupled to the first component 1 along the axial direction. The second component 2 includes a second body 21 and a second magnetic element 22 disposed on the second body 21. One of the first magnetic element 12 and the second magnetic element 22 is a coil, and the other is a permanent magnet (e.g., a magnetic steel) or an electromagnet (e.g., an electromagnetic coil).

[0049] It should be noted that, in the description of this application, "axial direction" refers to the axial direction of the linear motor 100, the axial direction of the first component 1, or the axial direction of the second component 2. Figure 2 The dotted line L extends in the direction of the line. The dotted line L is the central axis of the linear motor 100, and also the central axis of the first component 1 and the second component 2. In the following description, "radial" refers to the radial direction of the linear motor 100, the first component 1, or the second component 2. It refers to the direction passing through the central axis of the linear motor 100 on the radial plane of the linear motor 100. The radial plane is perpendicular to the axial direction. "Radial" is perpendicular to "axial" and "axial" is the circumferential direction of the linear motor 100, the first component 1, or the second component 2. It refers to the direction around the central axis L of the linear motor 100. "Axial" is perpendicular to "radial" and "circumferential" respectively.

[0050] It is understandable that when the second component 2 moves relative to the first component 1 along the axial direction, the first magnetic element 12 and the second magnetic element 22 cooperate to make the linear motor 100 output vibration damping force, thereby achieving the vibration damping effect of the linear motor 100 on the vehicle. For example, the first magnetic component 12 is a coil, and the second magnetic component 22 is a permanent magnet. When the first magnetic component 12 is energized, it generates a magnetic field. The magnetic field generated by the energized first magnetic component 12 interacts with the magnetic field of the second magnetic component 22 to generate a force, causing the second component 2 to have a tendency to move axially relative to the first component 1, that is, to form the thrust or damping of the linear motor 100. Thus, when the linear motor 100 is used in a vehicle, the linear motor 100 can change the height of the vehicle body relative to the wheels to adjust the posture of the entire vehicle body, thereby facilitating the vehicle to drive in a suitable posture. At this time, the magnitude and direction of the current of the first magnetic component 12 can be changed to change the magnetic field strength and direction of the first magnetic component 12, thereby changing the force between the first component 1 and the second component 2, realizing the adjustment of the thrust of the linear motor 100 and changing the damping of the linear motor 100, thereby realizing the lifting or lowering of the vehicle posture, while also playing a vibration reduction role. Of course, the first magnetic component 12 can also be a permanent magnet, and the second magnetic component 22 can be a coil. For example, the vehicle has multiple linear motors 100, which are mounted on different wheels. The multiple linear motors 100 can be controlled independently to adjust the posture of one side of the vehicle (e.g., raising or lowering the height of one side of the vehicle).

[0051] For example, taking the linear motor 100 with its axis in the vertical direction as an example, the second component 2 and the first component 1 can be movable and engaged in the vertical direction. The first component 1 is directly or indirectly connected to the vehicle body, and the second component 2 is directly or indirectly connected to the wheel. In this case, a part of the first component 1 can be located on the upper side of the second component 2; or the first component 1 is directly or indirectly connected to the wheel, and the second component 2 is directly or indirectly connected to the vehicle body. In this case, a part of the first component 1 can be located on the lower side of the second component 2. The movable engagement of the second component 2 and the first component 1 adjusts the axial length of the linear motor 100 to adjust the vehicle body posture, thereby adapting to different driving conditions and maintaining vehicle stability.

[0052] like Figure 2As shown, the linear motor 100 also includes a detection component 3, which is used to detect the displacement of the second component 2 relative to the first component 1. The detection component 3 includes a first detection element 31 and a second detection element 32. The first detection element 31 is disposed on the first component 1 and the second detection element 32 is disposed on the second component 2. When the first component 1 and the second component 2 move relative to each other in the axial direction, the first detection element 31 and the second detection element 32 also move relative to each other in the axial direction to detect the displacement of the second component 2 relative to the first component 1. In this configuration, at least a portion of at least one of the first detection element 31 and the second detection element 32 is located on both sides of the second body 21 along with the second magnetic element 22. Since the area around the second magnetic element 22 usually generates a high temperature during the operation of the linear motor 100, by placing at least a portion of at least one of the first detection element 31 and the second detection element 32 along with the second magnetic element 22 on both sides of the second body 21, it is convenient for at least one of the first detection element 31 and the second detection element 32 to avoid the area on the second component 2 where high temperatures are easily generated. At the same time, it is beneficial to dissipate heat through natural wind, etc., which is beneficial to cooling down at least one of the first detection element 31 and the second detection element 32 and improving the reliability of the detection component 3.

[0053] For example, at least a portion of at least one of the first detection element 31 and the second detection element 32 is located outside the second body 21, and the second magnetic element 22 is located inside the second body 21; or, at least a portion of at least one of the first detection element 31 and the second detection element 32 is located inside the second body 21, and the second magnetic element 22 is located outside the second body 21; of course, in other examples, at least a portion of at least one of the first detection element 31 and the second detection element 32 and the second magnetic element 22 may also be located on opposite sides of the second body 21 in another direction.

[0054] Furthermore, it is understood that when at least a portion of at least one of the first detection element 31 and the second detection element 32 is disposed outside the second body 21, the detection component 3 occupies less internal space of the second body 21, facilitating the rational use of internal space, and the linear motor 100 will not excessively increase internal space of the second body 21 due to the placement of the detection component 3. In this application, "disposed outside the second body 21" refers to being disposed outside the cavity 210 formed within the second body 21; "inside and outside" refers to the shell separating the two. When the detection component 3 is a magnetic induction detection component, the magnetic field sensing element is disposed outside the second body 21. That is, the first magnetic element 12 and the second magnetic element 22 disposed within the second body 21 are separated from the magnetic field sensing element disposed outside the second body 21 by the second body 21, thereby protecting the magnetic field sensing element from magnetic field interference from the first magnetic element 12 and the second magnetic element 22, thus improving the detection accuracy of the detection component 3. Optionally, the second body 21 is a non-magnetic component, such as aluminum.

[0055] For example, the detection component 3 can be a non-contact detection component or a contact detection component; for instance, when the detection component 3 is a non-contact detection component, it can be a grating-type detection component, where the first detection element 31 is a grating ruler and the second detection element 32 is a grating sensor (e.g., Figure 2 (As shown), or the first detection element 31 is a grating sensor and the second detection element 32 is a grating ruler; when the detection component 3 is a contact detection component, the detection component 3 can be a resistive detection component, with the first detection element 31 being a resistive ruler and the second detection element 32 being a resistive sensor or a current sensor, or the first detection element 31 being a resistive sensor or a current sensor and the second detection element 32 being a resistive ruler. Alternatively, the detection component 3 can be a magnetic induction detection component, with the first detection element 31 being a magnetic field generating element and the second detection element 32 being a magnetic field sensing element, or the second detection element 32 being a magnetic field generating element and the first detection element 31 being a magnetic field sensing element, such as a Hall sensor, etc. The displacement detection principles of grating-type detection components, resistive detection components, and magnetic induction detection components are well known to those skilled in the art and will not be elaborated upon here. Of course, the type of detection component 3 is not limited to these.

[0056] According to an embodiment of the present invention, the linear motor 100 includes a detection component 3 comprising a first detection element 31 and a second detection element 32 to detect the position of the second component 2 relative to the first component 1. At least a portion of at least one of the first detection element 31 and the second detection element 32 and the second magnetic element 22 are respectively disposed on both sides of the second body 21. This facilitates that at least one of the first detection element 31 and the second detection element 32 avoids areas on the second component 2 where high temperatures are easily generated, thereby reducing the impact of the high temperature of the second component 2 on the detection component 3. This improves the reliability of the detection component 3 and the reliability of the linear motor 100.

[0057] Optionally, the detection component 3 can be a displacement sensor or a position sensor, etc.

[0058] In this embodiment of the application, the second body 21 can be used to accommodate at least a portion of the first magnetic element 12 and at least a portion of the second magnetic element 22, so that the second body 21 can provide a certain protection for the at least a portion of the first magnetic element 12 and the at least a portion of the second magnetic element 22; for example, a sliding cavity 210 is defined in the second body 21, and at least a portion of the first magnetic element 12 and at least a portion of the second magnetic element 22 are disposed in the sliding cavity 210. It is understood that, since the first component 1 and the second component 2 are movably coupled along the axial direction, the relative position of the second body 21 and the first magnetic component 12 in the axial direction can change. Therefore, the portion of the first magnetic component 12 housed within the second body 21 can change with the relative movement of the first component 1 and the second component 2. For example, throughout the entire stroke range of the relative movement of the first component 1 and the second component 2, a portion of the first magnetic component 12 is always housed within the second body 21. The second magnetic component 22 is disposed on the second body 21, for example, the second magnetic component 22 is fixed to the second body 21. The portion of the second magnetic component 22 housed within the second body 21 will not change with the relative movement of the first component 1 and the second component 2. Throughout the entire stroke range of the relative movement of the first component 1 and the second component 2, a portion or the entire second magnetic component 22 is housed within the second body 21.

[0059] In some embodiments, such as Figure 2 As shown, the second body 21 is constructed as a shell, with a cavity 210 formed within it. The second magnetic component 22 and the first magnetic component 11 are located inside the cavity 210, while the second detection component 32 is located outside the cavity 210. During the operation of the linear motor 100, a relatively high temperature is typically generated inside the shell. Placing the second detection component 32 outside the cavity 210 helps it avoid areas inside the shell where high temperatures are easily generated, and also facilitates heat dissipation of the second detection component 32 through natural ventilation.

[0060] In some embodiments, such as Figure 2 As shown, at least a portion of the first body 11 is housed within the second body 21. The first body 11 has a first guide portion 11a formed at one axial end, and the second body 21 has a second guide portion 21a formed thereon. The first guide portion 11a and the second guide portion 21a cooperate to guide the movement direction of the second component 2; and / or, the first body 11 has a third guide portion 11b formed at the other axial end, and the second body 21 has a fourth guide portion 21b formed thereon. The third guide portion 11b and the fourth guide portion 21b cooperate to guide the movement direction of the second component 2.

[0061] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0062] It is evident that the cooperation between the first guide portion 11a and the second guide portion 21a, and / or the cooperation between the third guide portion 11b and the fourth guide portion 21b, helps to improve the stability of the relative movement of the first component 1 and the second component 2 in the axial direction. At the same time, it is not necessary to guide the movement direction of the second component 2 through the first magnetic component 12 and / or the second magnetic component 22. The surfaces of the first magnetic component 12 and the second magnetic component 22 do not need to be set with high flatness, so as to reduce the processing difficulty and assembly difficulty of the first magnetic component 12 and the second magnetic component 22.

[0063] It is understandable that when the first guide portion 11a and the third guide portion 11b are formed at both ends of the first body 11 along the axial direction, the linear motor 100 can be guided by secondary positioning, so that the first component 1 and the second component 2 can form multiple positioning guides, so as to further improve the relative movement stability of the first component 1 and the second component 2, and at the same time, it is easy to ensure the working air gap between the second component 2 and the first component 1, especially the radial working air gap between the second component 2 and the first component 1, thereby improving the stability and reliability of the linear motor 100; at this time, the first guide portion 11a and the third guide portion 11b can be arranged at intervals along the axial direction.

[0064] Taking the vertical direction as an example, the upper end of the first body 11 is provided with a first guide portion 11a, and / or the lower end of the first body 11 is provided with a third guide portion 11b, or the lower end of the first body 11 is provided with a first guide portion 11a, and / or the upper end of the first body 11 is provided with a third guide portion 11b.

[0065] For example, the first guide portion 11a is a first guide rod 11, the second guide portion 21a is a first guide hole 21d; and / or, the third guide portion 11b is a second guide hole 11h, and the fourth guide portion 21b is a second guide rod 21e.

[0066] In some embodiments, such as Figure 2As shown, the second body 21 defines a cavity 210, and the second magnetic element 22 is disposed on the inner wall of the cavity 210. The first body 11 extends into the cavity 210, and at least a portion of the first magnetic element 12 is disposed within the cavity 210. When the linear motor 100 is operating normally, the first magnetic element 12 and the second magnetic element 22 move relative to each other. The second magnetic element 22 cuts magnetic lines of force, causing the linear motor 100 to generate a corresponding damping force. The damping force of the vibration reduction system can be controlled by adjusting the current of the first magnetic element 12.

[0067] For example, the first magnetic component 12, except for its lead wire, is entirely disposed within the cavity 210; or, during the relative movement of the second component 2 and the first component 1, a portion of the first magnetic component 12 may extend out of the cavity 210 in order to achieve good heat dissipation of the first magnetic component 12.

[0068] In some embodiments, such as Figure 2 As shown, the first body 11 has a first guide portion 11a and the second body 21 has a second guide portion 21a. The first guide portion 11a is a first guide rod 11g, and the second guide portion 21a is a first guide hole 21d. The first detection element 31 is disposed on the first guide rod 11g, and at least a portion of the first detection element 31 is adapted to extend out of the second body 21 through the first guide hole 21d to reduce the influence of the high temperature inside the second body 21 on the first detection element 31. At the same time, it is beneficial to reduce the space occupied by the first detection element 31 inside the second body 21. In addition, the above-mentioned installation of the first detection element 31 can reduce the requirement for the axial position of the first detection element 31. That is, during the movement of the second component 2 relative to the first component 1, the first detection element 31 is adapted to pass through the first guide hole 21d to reduce the axial arrangement space required by the linear motor 100 due to the setting of the detection component 3, thus facilitating the arrangement of the detection component 3.

[0069] For example, a cavity 210 is defined within the second body 21. A first guide hole 21d is formed at one axial end of the cavity 210. The first guide hole 21d penetrates the cavity wall of the cavity 210 along the axial direction. A first guide rod 11g passes through the first guide hole 21d, and a portion of the first guide rod 11g extends out of the second body 21 through the first guide hole 21d. During the relative axial movement of the first component 1 and the second component 2, the first detection element 31 is configured such that a portion of the first detection element 31 is adapted to extend out of the second body 21 through the first guide hole 21d. Alternatively, the first detection element 31 is configured to switch between a first state and a second state. In the first state, a portion of the first detection element 31 is adapted to extend out of the second body 21 through the first guide hole 21d, and in the second state, the entire first detection element 31 is adapted to extend out of the second body 21 through the first guide hole 21d.

[0070] In some embodiments, such as Figure 2 and Figure 3 As shown, a first mounting groove 11f is formed on the outer peripheral wall of the first guide rod 11g. The first mounting groove 11f can be formed by a portion of the outer peripheral wall of the first guide rod 11g being recessed radially inward. At least a portion of the first detection element 31 is accommodated in the first mounting groove 11f. Exemplarily, the first detection element 31 is disposed on the side of the first mounting groove 11f away from the peripheral wall of the first guide hole 21d. Thus, by providing the first mounting groove 11f, the placement of the first detection element 31 does not affect the fit between the first guide rod 11g and the first guide hole 21d, and the first detection element 31 is also less prone to scratches.

[0071] In some embodiments, such as Figure 2 and Figure 3 As shown, a second mounting groove 21c is provided on the outer wall of the housing near the first guide hole 21d. The second mounting groove 21c is used to mount the second detection element 32. It can be seen that the second mounting groove 21c is formed on the outer surface of the second body 21, penetrating the peripheral wall of the first guide hole 21d. Therefore, the second mounting groove 21c can be formed by a portion of the peripheral wall of the first guide hole 21d recessed radially outwards. At least a portion of the second detection element 32 is accommodated in the second mounting groove 21c. For example, the second detection element 32 is located on the side of the second mounting groove 21c away from the first guide rod 11g. Thus, by providing the second mounting groove 21c, it is easier to ensure that the placement of the second detection element 32 does not affect the fit between the first guide rod 11g and the first guide hole 21d. At the same time, the above-mentioned installation of the second detection element 32 helps the second body 21 provide suitable space for the second detection element 32, thus reducing the axial space occupied by the linear motor 100.

[0072] As can be seen, in the above technical solution, the side of the second mounting groove 21c away from the cavity 210 and the side of the second mounting groove 21c facing the first guide rod 11g are both open, and the second detection element 32 is exposed on the open side of the second mounting groove 21c to facilitate the installation of the second detection element 32.

[0073] For example, such as Figure 2 As shown, in the radial direction, the distance between the second detection element 32 and the central axis L of the linear motor 100 is less than the distance between the second magnetic element 22 and the central axis L of the linear motor 100. In the plane perpendicular to the axial direction, the orthographic projection of the second detection element 32 is located within the outer contour of the orthographic projection of the second magnetic element 22, so that the radial space occupied by the linear motor 100 will not be excessively increased due to the setting of the detection component 3.

[0074] In some embodiments, such as Figure 2As shown, in the direction from the end of the housing to the first guide hole 21d (which can be understood as the radial direction of the second body 21), at least part of the housing thickness gradually decreases, and the second detection element 32 and the second magnetic element 22 are located on the inner and outer sides of the housing respectively; at this time, the second detection element 32 can be set at the housing part where the thickness gradually decreases, so as to make better use of the space provided by the housing to facilitate the arrangement of the second detection element 32 and save the space occupied by the linear motor 100.

[0075] exist Figure 2 In the example, the thickness of the portion of the housing forming the second mounting groove 21c gradually decreases from the outside to the inside along the radial direction of the second body 21, so that the depth of the second mounting groove 21c in the axial direction of the second body 21 gradually increases from the outside to the inside along the radial direction of the second body 21, so as to provide arrangement space for the second detection element 32 and facilitate reliable cooperation between the second detection element 32 and the first detection element 31.

[0076] In some embodiments, such as Figure 2 As shown, the linear motor 100 also includes a first guide bearing 4. The first guide rod 11g is connected to one of the first guide bearings 4 in the housing. The first guide rod 11g is slidably engaged with the other first guide bearing 4 in the housing. Thus, the first guide bearing 4 can guide the movement direction of the second component 2 relative to the first component 1, thereby improving the movement stability of the second component 2 relative to the first component 1.

[0077] exist Figure 2 In one example, the first guide bearing 4 is fixedly connected to the housing and slides with the first guide rod 11. The first guide bearing 4 is located at the first guide hole 21d, and the first guide bearing 4, the second body 21, and the second detection element 32 can remain relatively stationary. The first guide rod 11g passes through the first guide bearing 4, and the first guide bearing 4 and the first guide rod 11g can guide the movement of the second component 2 relative to the first component 1. In other examples, the first guide bearing 4 slides with the housing and is fixedly connected to the first guide rod 11g.

[0078] In some embodiments, such as Figure 2As shown, the second detection element 32 is located outside the second body 21, that is, outside the cavity 210. This provides ample operating space for the second detection element 32 during installation, improving its ease of installation. Furthermore, the portion of the first body 11 located inside the second body 21 will not collide with the second detection element 32 when moving relative to the second body 21 within the cavity 210. The first guide bearing 4 is also located outside the second body 21, that is, outside the cavity 210. The first guide bearing 4 is positioned on the side of the second detection element 32 opposite to the second body 21, and it covers at least a portion of the second detection element 32. Therefore, perpendicular to the axial direction (i.e., perpendicular to the second component 2 relative to the first component 1), the second detection element 32 is positioned on the side opposite to the second body 21. In the plane of the moving direction, at least a portion of the orthographic projection of the second detection element 32 lies within the orthographic projection range of the first guide bearing 4. Therefore, when the second component 2 moves relative to the first component 1, the portion of the first body 11 or the second body 21 outside the cavity 210, or the portion connected to the first body 11 or the second body 21 outside the cavity 210 (e.g., the first buffer 61 described later), regardless of which portion moves relative to the cavity 210, can be separated by the first guide bearing 4. This prevents either of the two portions from colliding with the second detection element 32, effectively protecting the second detection element 32 and improving its reliability. Furthermore, in the above solution, the first guide bearing 4 does not obstruct the space between the first detection element 31 and the second detection element 32, avoiding any obstruction of the second detection element 32 that could affect detection accuracy.

[0079] For example, in Figure 2 In one example, the second component 2 moves vertically and engages with the first component 1. A first guide hole 21d is formed on the top wall of the cavity 210. The second detection element 32 is fixed to the upper side of the top wall, and the first guide bearing 4 is fixed to the top wall and located above the second detection element 32, such that the first guide bearing 4 covers at least a portion of the upper side of the second detection element 32. Alternatively, in other examples, the first guide hole 21d can also be formed on the bottom wall of the cavity 210, the second detection element 32 can be fixed to the lower side of the bottom wall, and the first guide bearing 4 can be fixed to the bottom wall and located below the second detection element 32.

[0080] Optionally, in Figure 2In the example, a second mounting groove 21c is formed on the peripheral wall of the first guide hole 21d. The second detection element 32 is disposed on the side of the second mounting groove 21c away from the first guide rod 11g, and the side of the second mounting groove 21c away from the cavity 210 is open, so that the second detection element 32 is located outside the cavity 210. This facilitates the installation of the second detection element 32 and allows the other of the first body 11 and the second body 21 to provide suitable arrangement space for the second detection element 32, which helps to reduce the axial space occupied by the linear motor 100. It also helps to reduce the axial distance between the first guide bearing 4 and the cavity wall of the cavity 210 with the first guide hole 21d, which facilitates the connection between the first guide bearing 4 and the cavity and improves the installation convenience of the first guide bearing 4. Of course, if the second body 21 does not have a second mounting groove 21c, the second detection element 32 can be disposed on the outside of the cavity wall of the cavity 210 with the first guide hole 21d, so that the second detection element 32 is located outside the cavity 210.

[0081] In some embodiments, such as Figure 2 As shown, the second detection element 32 is located at the first guide hole 21d and outside the cavity 210. This not only ensures reliable cooperation between the second detection element 32 and the first detection element 31, but also reduces the impact of the high temperature inside the second body 21 on the second detection element 31. This helps to reduce the space occupied by the second detection element 32 inside the second body 21 and facilitates the arrangement of the detection assembly 3.

[0082] Of course, in other embodiments of this application, the second detection element 32 may also be disposed in the second body 21, or the second detection element 32 may be disposed in the first guide hole 21d.

[0083] As can be seen, in this embodiment, under the premise that the first detection element 31 and the second detection element 32 reliably cooperate to detect the displacement of the second component 2 relative to the first component 1, and the first guide rod 11g and the first guide hole 21d reliably cooperate to guide the movement direction of the second component 2, the space at the first guide rod 11g and the first guide hole 21d can be reasonably utilized to arrange the detection component 3. This is beneficial to reducing the radial occupation of the detection component 3 on the internal space of the second body 21, and also ensures that the setting of the detection component 3 does not affect the cooperation between the first magnetic element 12 and the second magnetic element 22. Obviously, compared with some technologies that do not leave room for the structural design of the detection component, this application, by setting the detection component 3, is conducive to achieving accurate control, and at the same time, it makes a comprehensive consideration of the layout of the detection component 3, which has practical process feasibility.

[0084] In some embodiments, such as Figures 6-8As shown, the housing at the first guide hole 21d is provided with a first notch 11j. The first notch 11j is used to set the second detection element 32, so that the second detection element 32 can be set opposite to the first magnetic element 31, and the housing at the first guide hole 21d will not block the second detection element 32 and affect the detection accuracy.

[0085] For example, the first notch 11j is disposed opposite to the first detection element 31, and the second detection element 32 is disposed at the first notch 11j and exposed outside the housing. In this way, the portion of the housing at the first guide hole 21d can be enclosed together with the second detection element 32 around the outer periphery of the first guide rod 11g, so as to achieve a reliable fit between the first detection element 31 and the second detection element 32. At this time, the second detection element 32 can be exposed outside the first notch 11j so that the second detection element 32 is disposed outside the cavity 210.

[0086] In some embodiments, such as Figures 6-8 As shown, the linear motor 100 also includes a first guide bearing 4. A first guide rod 11g is connected to one of the first guide bearings 4 in the housing. The first guide rod 11g is slidably engaged with the other first guide bearing 4 in the housing. Thus, the first guide bearing 4 can guide the movement direction of the second component 2 relative to the first component 1, improving the movement stability of the second component 2 relative to the first component 1. The first guide bearing 4 has a second notch 40. The second notch 40 is disposed opposite to the first detection element 31. The second notch 40 is also disposed opposite to the first notch 11j and the second detection element 32. The second detection element 32 is disposed on the radial outer side of the second notch 40, and the first detection element 31 is disposed on the radial inner side of the second notch 40, so that the second detection element 32 can be disposed opposite to the detection element 31, avoiding the first guide bearing 4 from obstructing the second detection element 32 and affecting the detection accuracy.

[0087] It is understandable that in the above scheme, the position of the first guide bearing 4 relative to the second body 21 is set more flexibly. The first guide bearing 4 can be set outside the second body 21 or at least partially set inside the second body 21.

[0088] Optionally, in Figures 6-8In the example, the housing at the first guide hole 21d is provided with an annular flange 11i, which surrounds the first guide rod 11g. The first guide bearing 4 is located inside the flange 11i. The flange 11i forms a first notch 11j, which is opposite to the second notch 40. The second detection element 32 is connected to the first notch 11j. In this way, the second detection element 32 can be connected to the first guide hole 21d of the second body 21. Since the second notch 40 is opposite to the first detection element 31, and the first notch 11j is opposite to the second notch 40, the first notch 11j is also opposite to the first detection element 31. The connection of the second detection element 32 to the first notch 11j also achieves the relative arrangement between the first detection element 31 and the second detection element 32, resulting in good alignment between them.

[0089] It is understood that, in the embodiments of this application, when the linear motor 100 includes the first guide bearing 4, the second detection element 32 may be connected to at least one of the first guide bearing 4 and the second body 21.

[0090] In some embodiments, the linear motor 100 includes a first guide bearing 4, a first guide rod 11g connected to one of the first guide bearings 4 in the housing, and the first guide rod 11g slidingly engaged with the other first guide bearing 4 in the housing. The first guide bearing 4 has a second notch 40, and a second detection element 32 is disposed at the second notch 40, allowing the second detection element 32 to be exposed outside the first guide bearing 4 without obstructing the detection accuracy between the first and second detection elements 31 and 32. In this case, the second detection element 32 can be connected to the first guide bearing 4. Optionally, if the first guide bearing 4 is located outside the cavity 210, the second detection element 32 can also be located outside the cavity 210.

[0091] In some embodiments, such as Figure 3 and Figure 4 As shown, the first guide rod 11g has a first positioning part 11c, and the first guide bearing 4 has a second positioning part 4a. The second positioning part 4a and the first positioning part 11c are circumferentially positioned together so that the first detection element 31 and the second detection element 32 are radially opposite each other, thereby achieving a reliable fit between the first detection element 31 and the second detection element 32.

[0092] For example, such as Figure 3 and Figure 4As shown, the first positioning part 11c is formed as a positioning groove, and the second positioning part 4a is formed as a positioning through hole. The positioning element passes through the positioning through hole and is adapted to be positioned and engaged with the positioning groove, so that the positioning groove and the positioning through hole are arranged radially opposite each other. This achieves circumferential positioning of the second component 2 and the first component 1 during assembly, and also facilitates the accurate alignment of the first detection element 31 with the second detection element 32, realizing the detection function of the detection component 3. It can be understood that the axial length of the positioning groove can be specifically set according to actual needs. Optionally, the positioning element is a positioning pin, etc.

[0093] In some embodiments, such as Figures 2-4 As shown, a wiring groove 11d is formed on the outer peripheral wall of the first guide rod 11g. The connecting wire of the first magnetic component 12 is guided to the outside of the second body 21 through the wiring groove 11d, which facilitates the wire exit of the first magnetic component 12. The wire exit of the first magnetic component 12 will not interfere with the cooperation between the first guide rod 11g and the first guide hole 21d. When the second component 2 moves relative to the first component 1, it will not cause wear to the wire exit of the first magnetic component 12.

[0094] As can be seen, the wiring groove 11d can be formed by a portion of the outer peripheral wall of the first guide rod 11g being recessed radially inward, so that a gap is formed between the peripheral wall of the first guide rod 11g and the first guide hole 21d, so as to arrange the wiring of the first magnetic component 12. At the same time, the wiring of the first magnetic component 12 does not need to pass through the first guide rod 11g when it is arranged. It is only necessary to place the wiring of the first magnetic component 12 in the wiring groove 11d, which improves the convenience and reliability of wiring arrangement.

[0095] In some embodiments, such as Figure 2 As shown, when the first body 11 has a third guide portion 11b and the second body 21 has a fourth guide portion 21b, the third guide portion 11b is a second guide hole 11h, and the fourth guide portion 21b is a second guide rod 21e. The second guide rod 21e passes through the second guide hole 11h and slides in cooperation with it. The first body 11 has a clearance space 11e, which communicates with the second guide hole 11h. The second guide rod 21e is adapted to be accommodated in the clearance space 11e. It can be seen that the clearance space 11e can provide movement space for the second guide rod 21e, and the peripheral wall of the clearance space 11e does not need to guide the second guide rod 21e. For example, if the peripheral wall of the clearance space 11e is spaced apart from the outer peripheral wall of the second guide rod 21e, then, under the premise of ensuring reliable cooperation between the second guide hole 11h and the second guide rod 21e, it is beneficial to appropriately reduce the axial length of the second guide hole 11h and simplify the processing steps.

[0096] It is understandable that, axially, the position of the second guide hole 11h relative to the clearance space 11e can be specifically set according to actual needs. For example, in Figure 2 In the example, the second guide hole 11h is located at one end of the clearance space 11e away from the first guide portion 11a, which facilitates the machining of the peripheral wall of the second guide hole 11h. At the same time, it is beneficial to appropriately increase the axial distance between the first guide portion 11a and the second guide hole 11h, thereby further improving the guiding effect on the movement of the second component 2 relative to the first component 1. Of course, the second guide hole 11h can also be located at other positions such as the middle of the clearance space 11e in the axial direction.

[0097] In some embodiments, such as Figure 2 As shown, the first body 11 includes a second guide bearing 111, which defines a second guide hole 11h. The second guide rod 21e passes through the second guide bearing 111 and slides with it. The second guide bearing 111 is located at the end of the clearance space 11e away from the first guide portion 11a, which facilitates the installation and fixing of the second guide bearing 111. It also helps to appropriately increase the axial distance between the first guide portion 11a and the second guide hole, further improving the guiding effect on the movement of the second component 2 relative to the first component 1.

[0098] For example, the first body 11 includes a body portion and a second guide bearing 111. The body portion defines a clearance space 11e, and the second guide bearing 111 is fixed in the clearance space 11e. At least a portion of the second guide bearing 111 can be located within the clearance space 11e. The second guide bearing 111 can be fixed to the peripheral wall of the clearance space 11e by means of retaining rings 112. In this case, retaining rings 112 are provided on both axial sides of the second guide bearing 111 to restrict the axial position of the second guide bearing 111.

[0099] In some embodiments, the detection component 3 is an electromagnetic induction component, for example, the first detection element 31 is a magnetic field generating element and the second detection element 32 is a magnetic field sensing element, or the second detection element 32 is a magnetic field generating element and the first detection element 31 is a magnetic field sensing element, such as a Hall sensor, a magnetoresistive sensor, etc.; one of the first detection element 31 and the second detection element 32 is used to sense the magnetic field of the other.

[0100] For example, when the second component 2 reciprocates relative to the first component 1, the magnetic field sensing element reciprocates relative to the magnetic field generating element, causing a change in the relative position of the magnetic field sensing element and the magnetic field generating element, thereby changing the magnetic field strength at each position. The magnetic field sensing element senses the change in magnetic field strength and generates a magnetic field signal, which is then converted into an electrical signal. This electrical signal can then be converted into a digital signal or an analog signal, etc., to obtain the displacement change of the second component 2 relative to the first component 1. The vibration damping force output by the linear motor 100 is adjusted by this displacement change, resulting in a better vibration damping effect for the vehicle.

[0101] This avoids the high alignment requirements between the grating guide rail and the grating scanning head required when using a grating sensor to detect the aforementioned displacement changes. It also avoids the problem that misalignment between the grating guide rail and the grating scanning head due to misalignment of the second component 2 relative to the first component 1 can lead to inaccurate displacement detection and prevent the linear motor from outputting the corresponding damping force. Furthermore, the magnetic field sensing element and the magnetic field generating element have low environmental requirements; impurities such as oil and dust have minimal impact on the magnetic field, resulting in good reliability and detection accuracy, further improving the vibration damping effect of the linear motor 100.

[0102] In some embodiments, such as Figure 2 As shown, the linear motor 100 also includes a first buffer 61, which is fixed to the first body 11 and located inside the second body 21. Before assembling the first component 1 and the second component 2, the first buffer 61 can be fixed to the first body 11 first, and then the first component 1 and the second component 2 can be assembled, so that the first buffer 61 is located inside the second body 21, which facilitates the installation of the first buffer 61. The linear motor 100 also includes a second buffer 62, which is fixed to the first body 11 and located outside the second body 21.

[0103] Furthermore, the first buffer 61 can limit the maximum axial length of the linear motor 100, reduce the collision between the second component 2 and the first component 1, thereby reducing the damage to the second component 2 and the first component 1, and thus playing a limiting protection role; the second buffer 62 can limit the minimum axial length of the linear motor 100, which can also reduce the collision between the second component 2 and the first component 1, reduce the damage to the second component 2 and the first component 1, and thus play a limiting protection role.

[0104] Optionally, the first buffer 61 and the second buffer 62 are rubber parts, etc.

[0105] Optionally, the linear motor 100 further includes a first guide bearing 4 and a second buffer member 62. The first guide bearing 4 is fixed to the second body 21 and is disposed at the first guide hole 21d and slides with the first guide rod 11g. The first guide bearing 4 and the second detection member 32 are both located outside the second body 21. The second buffer member 62 is fixed to the first body 11 and is disposed outside the second body 21. The first guide bearing 4 is located between the second buffer member 62 and the second detection member 32 to separate the second buffer member 62 and the second detection member 32, so as to protect the second detection member 32 from being squeezed by the first buffer member 61.

[0106] exist Figure 2In the example, a first guide portion 11a is formed at one axial end of the first body 11. The first buffer 61 and the second buffer 62 are both arranged around the first guide portion 11a. The first guide portion 11a is formed as a first guide rod 11g. The second buffer 62 is disposed on the outer periphery of the first guide rod 11g. The second body 21 is formed as a second guide portion 21a, which is formed as a first guide hole 21d. The axial direction is up and down. The first guide hole 21d is formed on the top wall of the cavity 210. The second detection element 32 is fixed at the first guide hole 21d and is disposed outside the cavity 210. The first buffer 61 and the first guide rod 11g remain relatively stationary. At this time, a first guide bearing 4 can be provided between the first buffer 61 and the second detection element 32 to separate the first buffer 61 and the second detection element 32, so that the first guide bearing 4 can protect and shield the second detection element 32 so that the second detection element 32 will not be squeezed by the first buffer 61 when the linear motor 100 is running.

[0107] In some embodiments, such as Figure 1 and Figure 2 As shown, the linear motor 100 also includes a protective member 7, which surrounds the second buffer member 62. Both ends of the protective member 7 are sealed to the first component 1 and the second component 2, respectively, allowing the protective member 7, the first component 1, and the second component 2 to define a sealed cavity. The second buffer member 62 is located within the sealed cavity to provide dustproof and waterproof protection, thereby enhancing the protective capability of the linear motor 100. This makes the linear motor 100 suitable for harsh environments, improving its applicability and service life, and ensuring long-term reliable operation. The length of the protective member 7 in the direction of movement of the second component 2 is adjustable, allowing it to adapt to the relative movement of the first component 1 and the second component 2.

[0108] It is understandable that one end of the protective component 7 is directly and sealed to the first component 1 or indirectly and sealed through other components. Similarly, the other end of the protective component 7 is directly and sealed to the second component 2 or indirectly and sealed through other components.

[0109] In some embodiments, such as Figure 1 and Figure 2As shown, the linear motor 100 also includes a first mounting base 81, a second mounting base 82, and a damping spring 83. The first mounting base 81 is fixed to the first component 1, and the second mounting base 82 is fixed to the second component 2. The damping spring 83 is sleeved on the outside of the second buffer member 62. On the plane passing through the central axis L of the linear motor 100, the orthographic projection of the damping spring 83 and the orthographic projection of the second buffer member 62 at least partially overlap. The damping spring 83 abuts between the first mounting base 81 and the second mounting base 82 to absorb the vibration transmitted from the ground to the vehicle body when the vehicle is driving, ensuring that the vehicle has good driving smoothness, and at the same time, it helps to reduce the space occupied by the linear motor 100 in the moving direction of the second component 2.

[0110] Of course, the position of the damping spring 83 is not limited to this. The position of the damping spring 83 in the moving direction of the second component 2 can be set according to actual needs. For example, if the moving direction of the second component 2 is up and down, the damping spring 83 can be set at the upper, middle or lower part of the linear motor 100, etc., to adapt to the needs of different vehicle models; or, the damping spring 83 can be set outside the linear motor 100 to be set independently of the linear motor 100.

[0111] For example, in Figure 2 In the example, the linear motor 100 includes a protective component 7, a first mounting base 81, a second mounting base 82, and a damping spring 83. One end of the protective component 7 is sealed to the first mounting base 81, so that the protective component 7 is sealed to the first component 1 through the first mounting base 81. The other end of the protective component 7 is sealed to the second mounting base 82, so that the protective component 7 is sealed to the second component 2 through the second mounting base 82. The protective component 7, the first mounting base 81, and the second mounting base 82 together define a sealed cavity. The second buffer 62 is disposed in the sealed cavity to achieve dust protection and other protection for the second buffer 62. The damping spring 83 is sleeved on the outside of the protective component 7.

[0112] In the description of this application, "the direction of movement of the second component 2" refers to the direction of movement of the second component 2 relative to the first component 1, and does not mean that when the linear motor 100 is used in a vehicle or the like, the second component 2 is necessarily moving and the first component 1 is necessarily stationary; in other words, when the linear motor 100 is used in a vehicle, the second component 2 is connected to the vehicle's wheels and the first component 1 is connected to the vehicle's body, or the second component 2 is connected to the vehicle's body and the first component 1 is connected to the wheels.

[0113] A vehicle according to a second aspect embodiment of the present invention includes a body, wheels, and a linear motor 100 according to the first aspect embodiment of the present invention described above. One of the first component 1 and the second component 2 is adapted to be connected to the wheels of the vehicle, and the other of the first component 1 and the second component 2 is adapted to be connected to the body of the vehicle.

[0114] According to the vehicle of the present invention, by employing the linear motor 100 described above, the linear motor arrangement is flexible to a certain extent, which can improve vehicle stability.

[0115] Other configurations and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0116] The following is for reference. Figures 1-5 A linear motor 100 according to an embodiment of the present invention will be described in detail with reference to a specific example. It is to be understood that the following description is merely illustrative and not intended to limit the invention in any particular way.

[0117] like Figures 1-5 As shown, the linear motor 100 includes a first component 1, a second component 2, and a detection component 3. The first component 1 and the second component 2 move and cooperate in the vertical direction.

[0118] The first component 1 includes a first body 11 and a first magnetic element 12 disposed on the first body 11. The upper part of the first body 11 has a first guide rod 11g. The second component 2 includes a second body 21 and a second magnetic element 22 disposed on the second body 21. The second body 21 defines a cavity 210, and the top wall of the cavity 210 forms a first guide hole 21d. The first guide rod 11g passes through the first guide hole 21d to guide the movement direction of the second component 2. The outer peripheral wall of the first guide rod 11g forms a first mounting groove 11f, and the top wall of the cavity 210 forms a second mounting groove 21c, the upper side of the second mounting groove 21c being open. The second magnetic element 22 may include a plurality of annular permanent magnets arranged sequentially along the axial direction.

[0119] The detection component 3 is used to detect the displacement of the second component 2 relative to the first component 1 and includes a first detection element 31 and a second detection element 32. The first detection element 31 is a sensor grating or a sensor magnetic strip. The first detection element 31 is disposed in the first mounting groove 11f and is adapted to pass through the first guide hole 21d. The second detection element 32 is a sensor body. The second detection element 32 is disposed in the second mounting groove 21c (for example, the second detection element 32 is fixed to the groove wall of the second mounting groove 21c by bolts) so that the second detection element 32 is disposed outside the cavity 210.

[0120] The linear motor 100 also includes a first guide bearing 4 and a second buffer 62. The first guide bearing 4 is fixed to the second body 21 and is located above the second detection element 32, covering at least a portion of the second detection element 32 (e.g., the flange of the first guide bearing 4 covers the upper side of the second detection element 32). The first guide bearing 4 is slidably engaged with the first guide rod 11g. The second buffer 62 is fixed to the first body 11 and sleeved outside the first guide rod 11g. The second buffer 62 is located outside the cavity 210 and above the first guide bearing 4. During the operation of the linear motor 100, the first guide bearing 4 can always separate the second buffer 32 from the second detection element 32 to prevent the second buffer 62 from squeezing the second detection element 32. The linear motor 100 also includes a first buffer 61, which is located inside the cavity 210 and is interference-fitted with the first guide rod 11g.

[0121] A first positioning portion 11c is formed on the outer peripheral wall of the first guide rod 11g, and a second positioning portion 4a is formed on the first guide bearing 4. The first positioning portion 11c is formed as a positioning groove extending to both ends of the length of the first guide rod 11g, and the second positioning portion 4a is formed as a positioning hole. The positioning element passes through the positioning hole and is positioned and engaged with the positioning groove so that the first detection element 31 and the second detection element 32 are radially opposite each other. A wiring groove 11d is formed on the outer peripheral wall of the first guide rod 11g, and the first magnetic element 12 is guided to the outside of the cavity 210 through the wiring groove 11d; there are two wiring grooves 1d. The wiring groove 1d, the first positioning portion 11d, and the first mounting groove 11f are arranged circumferentially at intervals.

[0122] The first body 11 also has a second guide hole 11h, and the second body 21 has a second guide rod 21e. The second guide rod 21e is configured to cooperate with the second guide hole 11h to guide the movement direction of the second component 2.

[0123] As can be seen, by setting the first buffer 61 and the second buffer 62, the linear motor 100 has complete upper and lower limit and buffer functions. During the operation of the linear motor 100, the second component 2, as a moving part, jumps up and down with the vehicle suspension and tires. The first guide bearing 4 and the second guide bearing 111 ensure that it moves axially according to the design requirements. When jumping up, the upper end face of the second component 2 contacts the second buffer 62 to achieve a buffering effect. When jumping down to the limit, the top wall of the cavity 210 contacts the first buffer 61 installed on the first body 11 to play a buffering and limiting role.

[0124] The second body 21 includes a cylinder 211, a first cover plate 212, and a second cover plate 213. The first cover plate 212 is located at the top of the cylinder 211, and a first guide hole 21d is formed on the first cover plate 212. The first guide bearing 4 has a flange, which is fixed to the first cover plate 212 by bolts. The second cover plate 213 is located at the bottom of the cylinder 213 and encloses the cylinder 213. A second guide rod 21e is formed on the second cover plate 213 (the second guide rod 21e and the second cover plate 213 are either an integral part or separate parts). Optionally, the first cover plate 212 and the cylinder 211 are an integral part, and the second cover plate 213 is fixedly connected to the cylinder 211 by an assembly means. The first component 1 can fit into the cavity 210 through the lower opening of the cylinder 211, which improves the assembly convenience and maintenance convenience of the second component 2 and the first component 1, and has practical and complete assembly feasibility. For example, the outer peripheral wall of the cylinder 211 is provided with a plurality of circumferentially spaced lugs, each lug being fixed to the second cover plate 213 by bolts.

[0125] The second body 21 also includes a push rod 214, which is located on the lower side of the second cover plate 213 and is fixedly connected to the second cover plate 213 (e.g., by welding or by bolts). The push rod 214 is connected to the vehicle's suspension by bolts.

[0126] The linear motor 100 also includes a first mounting base 81, a second mounting base 82, and a damping spring 83. The first mounting base 81 is fixed to the top of the first component 1. The first mounting base 81 includes a tower base 811, a tower top nut 812, a tower top damping structure 813, and a spring upper seat 814. The tower base 811 forms a receiving groove, and the tower top damping structure 813 is disposed in the receiving groove. A first guide rod 11g passes through the bottom wall of the receiving groove and the tower top damping structure 813. The tower top nut 812 is threadedly connected to the first guide rod 11g to connect the first guide rod 11g to the tower top damping structure 813. The spring upper seat 814 is disposed around the outer periphery of the tower base 811, and the spring upper seat 814 directly or indirectly abuts against the upper end of the damping spring 83. The tower base 811 is connected to the vehicle body through a nut. The second mounting base 82 is sleeved outside the cylinder 211 and connected to the cylinder 211. The second mounting base 82 directly or indirectly abuts against the lower end of the vibration damping spring 83. A protective component 7 is connected between the tower base 811 and the cylinder 211.

[0127] The linear motor 100 of this application has active adjustment capability and can directly replace existing passive dampers, semi-active dampers, etc., enabling the entire vehicle chassis to have true active adjustment function. Through ingenious design, the space at the first guide rod 11g and the first guide hole 21d is utilized, which has advantages in many aspects such as layout space, measurement accuracy, service life, and assembly convenience. The structure and function are complete, the guiding, limiting and sealing designs are well coordinated, and the assembly and maintenance have a complete design logic. Moreover, the compact structural design and close cooperation between the components fully realize the function of the linear motor 100. With the help of electronic control, the output thrust and movement stroke of the linear motor 100 are matched, which increases the smoothness and comfort of the entire vehicle.

[0128] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0129] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0130] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0131] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0132] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A linear motor, characterized in that, include: The first component includes a first body and a first magnetic element disposed on the first body; The second component is axially movable and engages with the first component. The second component includes a second body and a second magnetic element disposed on the second body. A detection component is provided for detecting the displacement of the second component relative to the first component. The detection component includes a first detection element and a second detection element. The first detection element is disposed on the first component, and the second detection element is disposed on the second component. At least a portion of at least one of the first detection element and the second detection element is located on both sides of the second body, respectively, along with the second magnetic element. One of the first magnetic component and the second magnetic component is a coil, and the other is a permanent magnet or an electromagnet; The second body is constructed as a shell, the shell having a cavity, the second magnetic component and the first magnetic component being located inside the cavity, and the second detection component being located outside the cavity; The first body has a first guide portion, the second body has a second guide portion, the first guide portion is a first guide rod, the second guide portion is a first guide hole, the first detection element is disposed on the first guide rod, and at least a portion of the first detection element is adapted to extend out of the second body through the first guide hole; A first guide bearing is provided, the housing is connected to the first guide bearing, and the first guide rod is slidably engaged with the first guide bearing. A second mounting groove is provided on the outer wall of the housing near the first guide hole, and the second mounting groove is used to mount the second detection element. Both the first guide bearing and the second detection element are located outside the second body. The first guide bearing is located on the side of the second detection element opposite to the second body and covers at least a portion of the second detection element. The first guide bearing has a second notch, which is positioned opposite to the first detection element.

2. The linear motor according to claim 1, characterized in that, The outer peripheral wall of the first guide rod is formed with a first mounting groove, and at least a portion of the first detection element is accommodated in the first mounting groove.

3. The linear motor according to claim 2, characterized in that, In the direction from the end of the housing to the first guide hole, the thickness of at least part of the housing gradually decreases, and the second detection element and the second magnetic element are located on the inner and outer sides of the housing, respectively.

4. The linear motor according to claim 1, characterized in that, The second detection element is located at the first guide hole.

5. The linear motor according to claim 4, characterized in that, The housing at the first guide hole is provided with a first notch, which is used to set the second detection element.

6. The linear motor according to claim 1, characterized in that, The first guide rod has a first positioning part, and the first guide bearing has a second positioning part, which is circumferentially positioned with the first positioning part.

7. The linear motor according to claim 1, characterized in that, The outer peripheral wall of the first guide rod is formed with a wiring groove, and the connecting wire of the first magnetic component is guided to the second body through the wiring groove.

8. The linear motor according to claim 1, characterized in that, When the first body has a third guide portion and the second body has a fourth guide portion, the third guide portion is a second guide hole and the fourth guide portion is a second guide rod. The first body has a clearance space, which is connected to the second guide hole. The second guide rod passes through the second guide hole and is adapted to be accommodated in the clearance space.

9. The linear motor according to claim 8, characterized in that, The first body includes a second guide bearing, which defines a second guide hole and is located at one end of the clearance space away from the first guide portion of the first body.

10. The linear motor according to any one of claims 1-9, characterized in that, The detection component is an electromagnetic induction component.

11. The linear motor according to any one of claims 1-9, characterized in that, Also includes: A first buffer and a second buffer are both fixed to the first body, with the first buffer located inside the second body and the second buffer located outside the second body.

12. The linear motor according to claim 11, characterized in that, Also includes: A protective component is provided around the second buffer component. The length of the protective component in the direction of movement of the second component is adjustable, and both ends of the protective component are respectively sealed to the first component and the second component.

13. The linear motor according to claim 11, characterized in that, Also includes: A first mounting base is fixed to the first component; A second mounting base is fixed to the second component; A damping spring is sleeved outside the second buffer member and abuts against the first mounting base and the second mounting base.

14. A vehicle, characterized in that, The device includes a body, wheels, and a linear motor according to any one of claims 1-13, wherein one of the first component and the second component is adapted to be connected to the wheels and the other is adapted to be connected to the body.

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